If money were no object, I'd look at the Haibike Full FatSix, Yamaha powered, dual suspension 26 x 4 tires. l can't speak for those other models, but I can this model as I own a 2016 model. Only difference is the upgraded motor and derailleur gearing system on the newer model. No camo paint job, but I can say it's the top of the heap in fat tired, off road mtb's. The rear thru axle can be swapped out for a Robert Axle thru axle that is specially made to accept a Bob Trailer to bring along with you.
The Yamaha PWX-2 on this bike is a mid drive, which is what a person wants who will be going off road, riding in flatland or in elevation. The Yamaha PW family of motors have proven to be spot-on reliable.
The idea of a fat tired ebike came into my mind back in 2015 when I stumbled upon Court's review of the Haibike FatSix and his review of the Felt Outfitter. The Outfitter was created by the owner of Felt Bicycles for the express purpose of going off-road to hunt game. No longer produced, I think that bike would be desirable to find. Powered by the Bosch mid drive, many were also fitted out with front and rear Old Man Mountain racks for carrying panniers and other gear. If you go to All Of Craigslist and type in "Felt Outfitter", you will find a nice example fitted out with the Bob trailer and includes an extra 500wh Bosch battery, right now. I believe the price to be fair.
Bulls is another top tier brand that offers a fat tired, Bosch powered fat bike, in both hard tail and dual suspension models called Monster.
Good luck! And from one USCG retiree to a Marine vet, thank you for your service.